Derry Water Quality
New Hampshire
According to EPA SDWIS, Derry, New Hampshire is served by 14 community water systems covering about 18,656 people. The same extract lists 25 health-based violation records, most recently coded 8000 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Derry, New Hampshire is delivered through 14 EPA-regulated community water systems serving an estimated 18,656 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 25 violation records across the 14 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 6 distinct EPA contaminant codes: Revised Total Coliform Rule, Nitrate, Lead and Copper Rule, Arsenic, TTHM and 1 others. 1 TRI-reporting industrial facility is also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the New Hampshire drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| DERRY WATER DEPT | 17,370 | 0 | Clean |
| ACKERMAN RETIREMENT PARK | 350 | 3 | Health |
| RAND SHEPARD HILL | 158 | 0 | Clean |
| CENTENNIAL ESTATES | 140 | 3 | Health |
| BRANCH RIVER APARTMENTS | 120 | 0 | Clean |
| STANYAN ROAD | 113 | 1 | Health |
| AUTUMN WOODS | 73 | 0 | Clean |
| FOREST GLEN CONDOS | 70 | 0 | Clean |
| WILLOW BEND | 55 | 0 | Clean |
| OLD COACH VILLAGE | 50 | 5 | Health |
| RUNNING BROOK | 47 | 0 | Clean |
| WILDER VILLAGE CLUSTER | 45 | 1 | Health |
| CAMELOT III | 33 | 12 | Health |
| BLUEBERRY KNOLL ESTATES | 32 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| CAMELOT III | Revised Total Coliform Rule | 2024-08-01 |
| CENTENNIAL ESTATES | Nitrate | 2023-07-01 |
| CENTENNIAL ESTATES | Nitrate | 2023-07-01 |
| CENTENNIAL ESTATES | Nitrate | 2023-07-01 |
| CAMELOT III | Lead and Copper Rule | 2020-10-08 |
| ACKERMAN RETIREMENT PARK | Arsenic | 2018-10-01 |
| CAMELOT III | Arsenic | 2018-07-01 |
| ACKERMAN RETIREMENT PARK | Arsenic | 2018-04-01 |
| CAMELOT III | TTHM | 2018-01-01 |
| ACKERMAN RETIREMENT PARK | Arsenic | 2018-01-01 |
| CAMELOT III | TTHM | 2017-07-01 |
| WILDER VILLAGE CLUSTER | Arsenic | 2017-07-01 |
| OLD COACH VILLAGE | Arsenic | 2017-04-01 |
| OLD COACH VILLAGE | Arsenic | 2017-01-01 |
| STANYAN ROAD | Revised Total Coliform Rule | 2016-11-01 |
| OLD COACH VILLAGE | Arsenic | 2016-10-01 |
| OLD COACH VILLAGE | Arsenic | 2016-07-01 |
| CAMELOT III | Arsenic | 2016-04-01 |
| CAMELOT III | Arsenic | 2016-01-01 |
| CAMELOT III | Arsenic | 2015-10-01 |
| CAMELOT III | Groundwater Rule | 2015-08-01 |
| CAMELOT III | Arsenic | 2015-07-01 |
| CAMELOT III | Groundwater Rule | 2015-06-07 |
| CAMELOT III | Arsenic | 2015-04-01 |
| OLD COACH VILLAGE | Groundwater Rule | 2013-03-10 |
What are Derry's health-based records for?
Derry's health-based violation records carry 6 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Arsenic | 14 | 4 |
| Groundwater Rule | 3 | 2 |
| Nitrate | 3 | 1 |
| Revised Total Coliform Rule | 2 | 2 |
| Tthm | 2 | 1 |
| Lead and Copper Rule | 1 | 1 |
TRI Facilities in Derry
| Facility | Total Releases |
|---|---|
| Fireye Inc | 1 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Derry, New Hampshire? ▼
How many water violations does Derry have in this EPA extract? ▼
What contaminants were found in Derry water? ▼
How many water systems serve Derry? ▼
Where does Derry get its drinking water? ▼
Are there pollution sources near Derry? ▼
How does Derry compare in New Hampshire?
Of the 179 New Hampshire places with at least one community water system on file, Derry ranks #8 by number of systems (14).
Either side of it: Exeter (20), Manchester (19), Concord (13), Glen (11)
About This Data
Figures here are the current EPA SDWIS extract joined to the 14 community water systems whose service area lists Derry, ranked against the 179 New Hampshire places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.